IIDX 8th Style Song Tiers. Listed in no order within actual tiers. * indicates I'm not sure where to put the song due to not remembering it too well. Might update this later. 

Best songs:
thunder
xenon
LOVE IS ORANGE

Excellent songs:
bit mania
Giudecca (Hidden chords)
memories
V35
DANCER
Yoru no Sangurasu
Blame
Smoke

Great songs:
airflow (Oldies Jazz)
MUSIC TO YOUR HEAD
Luv 2 Feel Your Body
Red Nikita
Halfway of Promise
Small Clone
murmur twins
ALL RIGHT
PLEASE DON'T GO
STEP INTO THE NEW WORLD

Good songs:
foundation of our love*
HORMIGA OBRERA*
Dual Control*
rainbow flyer
Sakura
ICF5800*
Symbolic
WAR GAME
Everyday Lovelyday
Suggestion

Okay songs:
Aoi Shoudou
Drivin'
FLUTE MAN*
Abstract
Colors Y&Co
Monkey Dance
LAB
TRIBAL MASTER
FUNKY BINGO PARADISE
WORLD WIDE LOVE
Celebrate Nite*

Crappy songs:
Blown my Heart Away
Attitude
STAR DREAM
ALIEN WORLD (Worst song on 8th, still not as bad as Stick Around though BOFL)
SPEED TRANCE MACH 3
Love Box

okay 8th kinda blows yeah. GOLD is the same thing except I'm not familiar with most of the music and would end up throwing everything under "crappy" probally. but that's alright because IIDX is gay :>